LIPTON, Eric. Study Maps the Location of Deaths in the Twin Towers. The New York Times. 2004-07-22. Dostupné online [cit. 2017-10-23]. ISSN0362-4331. (anglicky)
LIPTON, Eric. Study Maps the Location of Deaths in the Twin Towers. The New York Times. 2004-07-22. Dostupné online [cit. 2017-10-23]. ISSN0362-4331. (anglicky)